Um, so yeah. Apparently a 10-day LP IS enough to support a pregnancy. I got a + test yesterday at 12dpo :D
CB still hadn't arrived by the afternoon of 11dpo which is when I was expecting her. And then it got to be night, and still nothing. The following morning, my temp was still up, no sign of anything remotely red, and I had to pee like a horse, so I pulled out a test.
OF COURSE I couldn't get the stupid test open, there was no notch anywhere, I tried my teeth on one end, then the other, fingers a few more times and finally almost peeing my pants got it open using my teeth in the middle.
Relief! Watched the test as the urine went up the window, and could see something there right away. Shock! It was a definite second line, albeit quite faint. So. There we have it. Crossing fingers that all goes well from here.